AVAudioUnitMIDIInstrumentMBS class

Function:
The AVAudioUnitMIDIInstrument class is an abstract class representing music devices or remote instruments.Notes:
An AVAudioUnitMIDIInstrument subclass can be used in a chain that processes realtime input (live) and has general concept of music events, for example, notes.

Available in OS X v10.10 and later.
Subclass of the AVAudioUnitMBS class.